Weis' mother, Hyun Weis, was attacked Thursday with a small wooden baseball bat at her home but escaped, authorities said. She was released Friday from a hospital.

His girlfriend, Sophia Nicole Alsept, and two men police said he hired, Juan Antonio Velez Gonzalez, 18, and Brandon Michael Soroka, 19, were also arrested on the charge of conspiracy to commit first-degree murder.

Barnett said Weis wanted to sell his mother's car and use money in her bank accounts to pay for breast implants for Alsept, 21.

Barnett also said the suspects discussed wrapping Hyun Weis' body in plastic and dumping it in the desert in New Mexico or Arizona.

All were being held on $50,000 bail. Officials did not know whether they had attorneys and said they couldn't get messages to them.